WIP: started implementing the countdown state machine
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parent
0c95a27a3f
commit
7d36e71923
164
src/main.c
164
src/main.c
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@ -1,16 +1,24 @@
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#include "hardware/gpio.h"
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#include "hardware/irq.h"
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#include "hardware/pwm.h"
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#include "hardware/irq.h"
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#include "sseg.h"
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#include "buttons.h"
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#include "buzzer.h"
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#include "pinout.h"
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#include <pico/stdlib.h>
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const uint8_t all_gpios[] = {
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OUTPUT_ENABLE_PIN,
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};
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typedef enum {
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COUNTDOWN_UNINITIALIZED,
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COUNTDOWN_STOPPED,
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COUNTDOWN_STARTING,
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COUNTDOWN_RUNNING
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} countdown_state_t;
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static countdown_state_t m_countdown_state;
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static uint32_t m_last_state_change_time;
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static uint32_t m_countdown_off_time;
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static volatile bool m_ms_triggered;
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static uint32_t m_next_ms_trigger;
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@ -45,62 +53,139 @@ static void configure_ms_trig_alarm(void)
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m_next_ms_trigger = timer_hw->timelr + 10000;
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}
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static void update_countdown_fsm(uint32_t time_ms)
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{
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countdown_state_t last_state = m_countdown_state;
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// note: this calculation works even if time_ms overflows
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uint32_t time_in_state = time_ms - m_last_state_change_time;
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bool state_entered = (time_in_state == 1);
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uint32_t countdown_time_remaining; // only used in COUNTDOWN_RUNNING state
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switch(m_countdown_state) {
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case COUNTDOWN_UNINITIALIZED:
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m_countdown_state = COUNTDOWN_STOPPED;
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break;
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case COUNTDOWN_STOPPED:
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if(state_entered) {
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sseg_set_char(0, 'o', false);
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sseg_set_char(1, 'f', false);
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sseg_set_char(2, 'f', false);
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}
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if(buttons_get_events(BTN_ON) & BTN_EVENT_PRESSED) {
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m_countdown_state = COUNTDOWN_STARTING;
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}
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break;
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case COUNTDOWN_STARTING:
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// TODO: show a fancy animation + beep code
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if(buttons_get_events(BTN_ON) & BTN_EVENT_RELEASED) {
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// button released too early -> back to stopped state
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m_countdown_state = COUNTDOWN_STOPPED;
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}
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if(time_in_state == 3000) {
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m_countdown_off_time = time_ms + 30 * 60 * 1000;
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m_countdown_state = COUNTDOWN_RUNNING;
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}
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break;
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case COUNTDOWN_RUNNING:
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if(state_entered) {
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// countdown has been started -> switch on the load
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gpio_put(OUTPUT_ENABLE_PIN, true);
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}
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countdown_time_remaining = m_countdown_off_time - time_ms;
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// TODO: show time on display
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// TODO: off button handling
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// TODO: on button handling (extend time)
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// beep codes
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switch(countdown_time_remaining) {
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case 300000: // short beep at 5 minutes remaining
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case 60000: // double beep at 1 minute remaining
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case 59600:
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case 10000: // triple beep at 10 seconds remaining
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case 9600:
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case 9200:
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case 5000: // count down the last 5 seconds
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case 4000:
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case 3000:
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case 2000:
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case 1000: // last second beep is longer
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buzzer_on(1000);
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break;
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case 299800:
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case 59800:
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case 59400:
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case 9800:
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case 9400:
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case 9000:
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case 4800:
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case 3800:
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case 2800:
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case 1800:
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case 500:
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buzzer_off();
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break;
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}
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if(countdown_time_remaining == 0) {
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// switch off the load
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gpio_put(OUTPUT_ENABLE_PIN, false);
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m_countdown_state = COUNTDOWN_STOPPED;
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}
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}
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if(m_countdown_state != last_state) {
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m_last_state_change_time = time_ms;
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}
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}
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int main()
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{
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//stdio_init_all();
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//printf("Hello, world!\n");
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bool power_switch_state = false;
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gpio_init(OUTPUT_ENABLE_PIN);
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gpio_put(OUTPUT_ENABLE_PIN, false);
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gpio_set_dir(OUTPUT_ENABLE_PIN, true);
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for(size_t i = 0; i < sizeof(all_gpios); i++) {
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gpio_init(all_gpios[i]);
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gpio_put(all_gpios[i], false);
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gpio_set_dir(all_gpios[i], true);
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}
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buzzer_init();
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buttons_init();
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gpio_put(OUTPUT_ENABLE_PIN, true);
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// set up PWM for 50 kHz @ 512 steps resolution
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uint slice_num = pwm_gpio_to_slice_num(BUZZER_PIN);
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pwm_set_clkdiv_int_frac(slice_num, 244, (14 << 4) / 100); // 125 MHz / 244.14 / 512 = 1 kHz
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gpio_set_function(BUZZER_PIN, GPIO_FUNC_PWM);
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pwm_set_wrap(slice_num, 512);
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pwm_set_chan_level(slice_num, PWM_CHAN_B, 1 * 512 / 100);
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pwm_set_enabled(slice_num, true);
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buzzer_on(1000);
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sleep_ms(200);
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pwm_set_enabled(slice_num, false);
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pwm_set_clkdiv_int_frac(slice_num, 122, (7 << 4) / 100); // 125 MHz / 122.07 / 512 = 2 kHz
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pwm_set_enabled(slice_num, true);
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buzzer_off();
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buzzer_on(2000);
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sleep_ms(200);
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pwm_set_enabled(slice_num, false);
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pwm_set_clkdiv_int_frac(slice_num, 61, (3 << 4) / 100); // 125 MHz / 61.03 / 512 = 4 kHz
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pwm_set_enabled(slice_num, true);
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buzzer_off();
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buzzer_on(4000);
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sleep_ms(200);
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pwm_set_enabled(slice_num, false);
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gpio_init(BUZZER_PIN);
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gpio_put(BUZZER_PIN, false);
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gpio_set_dir(BUZZER_PIN, true);
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buzzer_off();
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sleep_ms(2400);
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pwm_set_enabled(slice_num, false);
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gpio_init(BUZZER_PIN);
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gpio_put(OUTPUT_ENABLE_PIN, false);
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sseg_init();
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configure_ms_trig_alarm();
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arm_ms_trig_alarm();
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m_countdown_state = COUNTDOWN_UNINITIALIZED;
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uint32_t ms_counter = 0;
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while (true) {
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sseg_loop();
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@ -109,6 +194,11 @@ int main()
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m_ms_triggered = false;
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ms_counter++;
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buttons_update_state(ms_counter);
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update_countdown_fsm(ms_counter);
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sseg_set_char(2, '0' + (ms_counter / 100) % 10, false);
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sseg_set_char(1, '0' + (ms_counter / 1000) % 10, true);
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sseg_set_char(0, '0' + (ms_counter / 10000) % 10, false);
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